* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  user-select: none;
  color-scheme: light dark;
  list-style: none;
}
body {
  display: grid;
  place-content: center;
  height: 100vh;
}
body::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(45deg, #e91e63, #e91e63 50%, #ffc170, #ffc170 50%);
  z-index: -10;
}

body::after {
  content: '';
  position: absolute;
  top: -10px;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(160deg, #03a9f4, #03a9f4 50%, transparent, transparent 50%);
  animation: animate 5s linear infinite;
  z-index: -10;
}
/* 背景动画 */
@keyframes animate {
  0%,
  100% {
    transform: translateY(10px);
  }
  50% {
    transform: translateY(-10px);
  }
}
body ul {
  display: grid;
  grid-auto-flow: column;
  grid-gap: 16px;
}
ul li {
  position: relative;
  width: 100px;
  height: 100px;
  background-color: rgba(0, 0, 0, 0.1);
  border-radius: 50%;
  display: grid;
  place-content: center;
  backdrop-filter: blur(10px);
}
ul li::before {
  position: absolute;
  content: '';
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  background-color: #bfa;
  border-radius: 50%;
  transform: scale(0);
  transition: transform 0.3s ease-in;
  z-index: -10;
}
ul li:hover::before {
  transform: scale(0.9);
  box-shadow: 0 0 10px 10px #bfa;
}
li:hover i {
  color: black;
}
li i {
  font-size: 4rem !important;
  font-weight: bold;
  transition: 0.5s;
}
